Windows 7: how Windows 7, out of the box, positions boot files on a HD?

I'm away from my new Windows 7 box ATM, but am curious. Has anyone here looked into how Windows 7, out of the box, positions boot files on a HD? Does it simply group them together wherever there is space or does it also position the group on faster outer tracks/cylinders?

Superfetch optimises the boot process, as well as loading programs. (See the link I posted above). I don't know about putting it on faster tracks, but it does place them all in a "line" so the spinner doesn't have to seek for them